Finding the Fourth Proportional to 1,162,449.72, 1,604,199.60 and 639,182.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,162,449.72 : 1,604,199.60 = 639,182.34 : x
2. Step 2: Convert to fraction form
   1,162,449.72/1,604,199.60 = 639,182.34/x
3. Step 3: Cross multiply
   1,162,449.72x = 1,604,199.60 × 639,182.34
4. Step 4: Simplify right side
   1,162,449.72x = 1,025,376,054,155.06
5. Step 5: Solve for x
   x = 1,025,376,054,155.06/1,162,449.72
6. Step 6: Final answer
   x = 882,082.07